USART's are used for generic serial communication between AVR32 processors and peripherals.
Three USARTs are available on product. The USART0 and USART1 are connected to external DB9 connectors and USART2 and USART3 are accessible through expansion headers.
Signal | Description | Peripheral and connectors | Available on GPIO |
---|---|---|---|
U0_RX | Receive serial data | (1),(5) | PA 0 |
U0_TX | Transmit serial data | (1),(5) | PA 1 |
U0_CTS | Clear to send | (1),(5) | PA 4 |
U0_RTS | Request to send | (1),(5) | PA 3 |
U0_CLK | Serial clock | (5) | PA 2 |
U1_RX | Receive serial data | (1),(5) | PA 5 |
U1_TX | Transmit serial data | (1),(5) | PA 6 |
U1_CTS | Clear to send | (1),(5) | PA 9 |
U1_RTS | Request to send | (1),(5) | PA 8 |
U1_CLK | Serial clock | (5) | PA 7 |
U1_RI | Ring indicator | (1),(5) | PB 26 |
U1_DTR | Data Terminal Ready | (1),(5) | PB 25 |
U1_DSR | Data Set Ready | (1),(5) | PB 24 |
U1_DCD | Data Carrier Detect | (1),(5) | PB 23 |
U2_RX | Receive serial data | (5) | PB 29 |
U2_TX | Transmit serial data | (5) | PB 30 |
U2_CLK | Serial clock | (5) | PB 31 |
U3_RX | Receive serial data | (5) | PB 10 |
U3_TX | Transmit serial data | (5) | PB 11 |
U3_CLK | Serial clock | (5) | PB 4 |